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    SubjectRe: [PATCH v9 01/17] riscv: Separate patch for cflags and aflags
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    On Tue, 09 Nov 2021 01:48:13 PST (-0800), greentime.hu@sifive.com wrote:
    > From: Guo Ren <ren_guo@c-sky.com>
    >
    > Use "subst fd" in Makefile is a hack way and it's not convenient
    > to add new ISA feature. Just separate them into riscv-march-cflags
    > and riscv-march-aflags.
    >
    > Signed-off-by: Guo Ren <ren_guo@c-sky.com>
    > Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
    > Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
    > ---
    > arch/riscv/Makefile | 18 ++++++++++++------
    > 1 file changed, 12 insertions(+), 6 deletions(-)
    >
    > diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
    > index 0eb4568fbd29..37de70df4fae 100644
    > --- a/arch/riscv/Makefile
    > +++ b/arch/riscv/Makefile
    > @@ -48,12 +48,18 @@ endif
    > endif
    >
    > # ISA string setting
    > -riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
    > -riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
    > -riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
    > -riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
    > -KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
    > -KBUILD_AFLAGS += -march=$(riscv-march-y)
    > +riscv-march-cflags-$(CONFIG_ARCH_RV32I) := rv32ima
    > +riscv-march-cflags-$(CONFIG_ARCH_RV64I) := rv64ima
    > +riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
    > +riscv-march-cflags-$(CONFIG_RISCV_ISA_C) := $(riscv-march-cflags-y)c
    > +
    > +riscv-march-aflags-$(CONFIG_ARCH_RV32I) := rv32ima
    > +riscv-march-aflags-$(CONFIG_ARCH_RV64I) := rv64ima
    > +riscv-march-aflags-$(CONFIG_FPU) := $(riscv-march-aflags-y)fd
    > +riscv-march-aflags-$(CONFIG_RISCV_ISA_C) := $(riscv-march-aflags-y)c
    > +
    > +KBUILD_CFLAGS += -march=$(riscv-march-cflags-y)
    > +KBUILD_AFLAGS += -march=$(riscv-march-aflags-y)
    >
    > KBUILD_CFLAGS += -mno-save-restore
    > KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)

    Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>

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